Color printing paste and process of making same



Patentedll/Iar, 1 9, 1929. I l A UNITED, STATES PATENT OFFICE.

JEAN GEORGES KERN AND CHARLES J. SALA, F WILMINGTON, DELAWARE, AS- SIGNORS TO E. I. DU PONT DE NEMOURS & COMPANY, OF WILMINGTON, DELA- WARE, A CORPORATION OF DELAWARE.

'ooLoR PRINTING PASTE Am rnoonss or MAKING SAME.

No Drawing. Application filed February 9, 1927. Serial No. 167,066.

This invention relates to dyestuff pastes, ants. These new assistants may comprise a and more particularly to dyestuft' pastes of crude ethylolamine mixture, for instance a vat colors, including both the indigoid and mixture of (li-ethylolamine and tri-ethylolaanlthraqulnone types for printing textile mine whlch may be obtained from-the distil- 5 fa rics. v

This case is in the nature of a continuation oxide and ammonia. These products contain in part of application of Charles J. Sala, valuable properties which when added to Serial Number 69,706, filed November 17, color pastes give greatly improved results. 1925. Theaverage analysis of this crude mixture Vat colors are insoluble dyestuffs which of diand tri-ethylolamine shows, byyacuum 60 ape rliduced by hydrosulfite in the presence distillation, the following characterlsticsz 0 al ali. The reduced body or leuco-compound is soluble and acts as a dyestufi'. The Gmde m l weld reduction is efiected in a thick paste" on the 28 gins. distillate which pass over between cloth by steaming. The process suffers from 130250 C. under; 150 m/m 65 the fact that during the short steaming it is v vacuum-di-ethylolamine 'B. P. extremely diflieult to effect the reduction of 217-18 the vat color, even though extraordinary 65 gins. distillate over 250283 C. under care is taken in the preparation of the dye- 150 m/m tri-ethylolamine B. P.

20 stufl paste as distinct from the printing 277-280 paste, such care resulting in a very finely di- 7 gms. residue vided, smooth color paste which contains the 1T0 solid matter in a highly dispersed form so that interaction may be as complete aspos- In P P g u color pastes We proceed sible. A constant complaint in the printing s follows: 7

trade is that the vat color printing pastes d-Vestufi paste produced m the produce specky prints and contain insoluble course of manufacture of P011591 blue GD coloring matter which is partially due to (Schultz No 842) 1s converted mto a press the drying out of the pastes in their containcake contamlng y C0101" 30 after y have been p In Order in 400 parts of the press cake are'then mixed '35 provement of vat color pastes by making a way to overcome this difliculty, the vat with color pastes must be kept in a cool and 20 Parts f glycerine d f room. 580 parts of the material (comprising the Th1s lnventlon has as an ob ectfthe 1mnew i t t) them more subjectto reduction and therefore 15 posslble to 7 the quantltles yielding uniform prints free from speckiness l' .wlt'hout 108mg the advantage.s' of and ofugreate'fr llilrightness. A further obj the invention; thus a paste'made by mixing: is to a ow o t e more complete'utilization 40 of the dyestufl' used. A still further object is g g ggfi gg fiig and 90 to prevent the drying out of vat color pastes. 10 Parts f glycerine hese objects are accomplished by the t a following invention in which the vat color 1 v ry much bet er than the comm rclal paste is mixed with a t ongl alkali pastes but 1t is not .qu1te as good as the one a high bolhng point. These bodies have a suits the quantity ofassistant-should not be very strongly solvent act-ion on vat colors. e u m c Q H i We" have found that the solubility of F lfty parts of a press cake of Ponsol pastes, as well as their. stability, can be in- Violet R D (S N OOIItaIIPII 50 creased considerably by the useof new assist- Of Water 0% dry-color e mlxe, 100

lation of the reaction products of ethylene organie'body soluble inwater and possessing previously described. To get the best rebetter solubility of the leucos,

13 Ponsol dark blue BR (Schult No. 763) 30.33% water 1.2 Leukanol 55.5 assistant Here again the quantities may We have found that in place of of the diand tri-ethylolamines, that either tri-ethylolamine alone or di-ethylolamine may be substituted in the, examples given. We have also found that mono-ethylolamineis also capable of effecting an improvement in dyestuif pastes, although not as great as that produced by either dior tri-ethylolamine.

The following are the most strikinggadvantages resulting from the invention:

1. They give the smoothest printing pastes with any thickening, characterized by a very pronounced binding.

2. They are excellent regulators of shades and always giye yery even results, especial eliminating unevenness which would originate from poor ageing conditions with the ordinary vat color printing pastes. 1

v3. There is abetter penetration, due to hence better be varied.

fixation and'better fastness.

4. The fastness to rubbing is increased.

" 1 5.. The brilliancy is very much enhanced.

6. Due to better fixation and fastness properties, the grounds are left perfectly white. A 4

7. Furthermore, which always give-very at least far greater difiiculties. in securing mixtures of vat colors standard shades by the old method, give very uniform colorin and a constant'shade when made up with t ese assistants. above process never dry out, const1tute almost'clear solutions? and at no time show atendency tospeckiness. With these pastes ception uniform and perfect prints. 9. The economy realized by obtaining a shade with half as much color in some instances is furthermore increased by the use of much less Rongalite and alkalis. This renders the use of these pastes especially interes'ting 'for silk ."of any fabrics whose fibers 'are' sensitive to alkalis.

1' a 10. Furthermore, the addition of these as sistants permits printing with vat colors,

this purpose (such a mixture paste,

uneven shades, on-

8. The pastes prepared according to the" printing or the printing which had been classified as unsuitable for as Indanthrene blue BCS or any similar vat dyestufi) due to the practical insolubility of their leuco derivatives.

As many apparently. widely different embodiments of this invention may be made without departing from the spirit-thereof,

it is to be undistood that we do not limit ourselves to the regoing examples or descriptions except as indicated in the following patent claims.

We claim p 1. A color paste comprising vat dyestufl' glycerine and di-ethylolamine. 2. A color paste comprising vat dyestuff paste, glycerine and a mixture of diand tri-ethylolami-ne. y

3.-A color paste comprising vat dyestuif paste, adispersing agent and tri-ethylolamine. 1. A printed fabric, the prints thereon comprising a color resulting from the application to the fabric of a color paste containing a crude mixture of ethylolamine. 5. A printed fabric, the prints thereon comprising a color paste applied in the presence of a compound composed of glycerine and ethylolamine.

6. A printed fabric, the resulting from the application of a color as te in admixture with ethylolamine and tri-ethylolamine.

7 A printed fabric, the prints thereon 9. A'color paste comprising a vat dyestuff paste and a mixture of diand tri-ethylola mine.

10. A printed fabric, the prints thereon resulting from the application of a color paste containing ethylolamine.

' 11. A printed fabric, resulting from the application of paste containing a mixture of diethylolamine.

12. A printed fabric, resulting frompaste having admixed therewith the. residue resulting from the distillation of the reaction products of ethylene oxide and ammonia.

In testimony tures.

a color and tnthe prints thereon whereof we afiix our signa- JEAN GEORGES KERN. CHARLES J. SALA.

prints thereon glycerine and d1-- comprising a color resulting from a paste the prints thereonthe application of a color 

